EP1504220A1 - A gas fired radiant heating unit and method of operation thereof - Google Patents

A gas fired radiant heating unit and method of operation thereof

Info

Publication number
EP1504220A1
EP1504220A1 EP03722151A EP03722151A EP1504220A1 EP 1504220 A1 EP1504220 A1 EP 1504220A1 EP 03722151 A EP03722151 A EP 03722151A EP 03722151 A EP03722151 A EP 03722151A EP 1504220 A1 EP1504220 A1 EP 1504220A1
Authority
EP
European Patent Office
Prior art keywords
cartridge
heating unit
housing
radiant heating
skirt
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03722151A
Other languages
German (de)
French (fr)
Other versions
EP1504220B1 (en
Inventor
Robert E. Kieswetter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heat Design Equipment Inc
Original Assignee
Heat Design Equipment Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Heat Design Equipment Inc filed Critical Heat Design Equipment Inc
Publication of EP1504220A1 publication Critical patent/EP1504220A1/en
Application granted granted Critical
Publication of EP1504220B1 publication Critical patent/EP1504220B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/12—Radiant burners
    • F23D14/14—Radiant burners using screens or perforated plates
    • F23D14/145—Radiant burners using screens or perforated plates combustion being stabilised at a screen or a perforated plate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2203/00—Gaseous fuel burners
    • F23D2203/10—Flame diffusing means
    • F23D2203/106—Assemblies of different layers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2212/00—Burner material specifications
    • F23D2212/10—Burner material specifications ceramic
    • F23D2212/103—Fibres
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2212/00—Burner material specifications
    • F23D2212/20—Burner material specifications metallic
    • F23D2212/201—Fibres

Definitions

  • This invention relates to an improved radiant heating unit and to an improved method of operation thereof. More particularly, this invention relates to a gas powered radiant heating unit that can be used with roadway surface reconditioning machines to heat various surfaces, including asphalt over a relatively large area. DESCRIPTION OF THE PRIOR ART
  • a radiant heating unit is described in U.S. Patent No. 5,218,952 issued to Neufeldt on June 15, 1993.
  • the Neufeldt patent describes a radiant heating unit having a housing with a layer of ceramic fiber sandwiched between two layers of mesh.
  • the heating unit described in the Neufeldt patent works well and is designed to withstand rough treatment. However, due to the extreme temperature conditions under which the heating unit operates, the mesh can fail or the ceramic fiber can become damaged. When this occurs, the housing portion of the unit must be returned to the manufacturer for refurbishing. The manufacturer then removes the old layers and replaces them with a new layer of ceramic fiber sandwiched between two new layers of mesh. This procedure takes approximately five to six hours for the manufacturer to complete, but the downtime for the unit to the user can easily be one to two weeks.
  • Patent No. 5, 218,952 by allowing the unit to be repaired quickly on site, thereby virtually eliminating nearly all of the downtime required for the previous device. It is a further object of the present invention to provide a cartridge that is quickly and easily removable and replaceable within the unit on site, the cartridge including the layer of ceramic fibre.
  • a radiant heating unit has supply means for supplying a quantity of fuel in vapor form at a predetermined pressure. There are means to mix air into the fuel and a housing having a periphery surrounding an open bottom. A removable and replaceable cartridge is affixed to the periphery, the cartridge covering the open bottom with a skirt extending downward beyond the cartridge. The housing and the cartridge define a chamber and the cartridge separates the chamber from' ambient air.
  • the chamber is connected to receive a fuel/air mixture.
  • the cartridge is removable and replaceable in the housing and contains multiple layers of non-flammable materials that are bound together into a single component. The layers are porous enough to allow the fuel/air mixture to flow through the cartridge at a rate so that combustion occurs at an outer surface of the cartridge.
  • a method of operating a radiant heating unit having a housing with an open bottom and a cartridge covering the open bottom with a skirt extending downward from the cartridge, the cartridge being sandwiched between the housing and skirt by retainers, the cartridge and housing defining a chamber, said method comprising the steps of commencing with a cartridge installed in the unit, when the cartridge becomes worn, removing the cartridge from the housing on site by removing the retainers, separating the skirt from the cartridge, and replacing the cartridge with a replacement cartridge and attaching the skirt to the housing with the cartridge sandwiched in between by reattaching the retainers.
  • Figure 1 there is shown a schematic side view of a burner housing;
  • Figure 2 is a top view of a cartridge;
  • Figure 3 is a partial sectional side view of the cartridge of Figure 2;
  • Figure 4 is a side view of the housing with control means on top;
  • Figure 5 is an end view of the housing with said control means on top;
  • Figure 6 is a top view of an upper section of the heater with the control means removed;
  • Figure 7 is a side view of the upper section of the heater;
  • Figure 8 is an end view of said upper section;
  • Figure 9 is a top view of a lower skirt of the heater;
  • Figure 10 is a side view of the lower skirt;
  • FIG 11 is a schematic side view of one embodiment of the heating unit including the fuel supply; and Figure 12 is a schematic side view of another embodiment of the heating unit including the fuel supply.
  • a burner 2 having a housing 4 with a bottom 6 covered by a cartridge 8.
  • the housing can be referred to, more specifically, as a plenum.
  • the burner 2 has a fuel supply line 10, which supplies a fuel mixture through an orifice 12 in a venturi 14.
  • the housing 4 and cartridge 8 define a chamber 16. Within the chamber 16, there is located a deflector 18, which distributes the fuel/air mixture evenly into the cartridge 8.
  • a skirt 20 extends downward from the cartridge 8. The skirt protects the cartridge from physical damage and maintains a minimum distance between the cartridge and a surface (not shown) to be heated.
  • the cartridge 8 is sandwiched between the housing and the skirt.
  • the cartridge has a top layer 22 and a rigid border 24.
  • the cartridge has four layers, a top layer 22 being an expandable metal screen, a second layer 26, located immediately beneath the top layer 22, made of stainless steel mesh (skein), a third layer 28, being an aluminum screen, located immediately beneath the second layer 26 and a bottom layer 30.
  • the bottom layer 30 is made from ceramic wool.
  • the layers are held together by the border 24, which is preferably crimped around the periphery of the layers 22, 26, 28, 30. Seals 32 are crimped between the border 24 and the top layer 22 and between the border 24 and the bottom layer 30 to prevent the fuel/air mixture (not shown) from leaking around the periphery of the layers.
  • the cartridge is a single component.
  • Figure 4 there is shown a side view of the burner 2 with a venturi cover 34 mounted on top of the housing 4. It can be seen that the cartridge 8 " is sandwiched between the housing 4 and the skirt 20 by bolts 36 and nuts 38. There are three bolts shown in Figure 4, but there are preferably only eight bolts in total, three along each side of the housing 4 and one bolt at each end. It can be seen that Figure 5 is an end view of the housing shown in Figure 4. The same reference numerals are used in Figure 5 as those used in Figure 4 to describe those components that are identical to one another.
  • the cartridge can be affixed between the housing and the skirt by retainers other than bolts. If bolts are used, the number of bolts could be more or less than eight.
  • FIG 6 there is shown a top view of the housing 4 with the control means 34 removed. It can be seen that there are eight clips 40 spaced around a periphery of the housing 4. Each of the clips 40 contains an opening 42 to receive one of the bolts 36 (not shown in Figure 6). A fuel/air mixture inlet 44 is located approximately in the center of the housing 4.
  • Figure 7 there is shown a side view of the housing shown in Figure 6. Those components that are identical to the components shown in Figure 6 are described using the same reference numerals.
  • a flange 45 located at the top corners of the housing 4 serves as a mounting bracket.
  • Figure 8 is an end view of the housing shown in Figure 7 and the same reference numerals are used in Figure 8 as those used in Figure 7 to refer to those components that are identical.
  • FIG 9 there is shown a top view of the skirt 20. It can be seen that an upper surface of the skirt 20 has a screen 46 affixed thereto.
  • the screen 46 provides support to the cartridge 8 when the skirt is installed on the burner 2 with the cartridge sandwiched between the skirt 20 and the housing 4. More particularly, the screen 46 provides support to the ceramic wool layer or bottom layer 30 of the cartridge 8.
  • the skirt 20 has a periphery with eight lugs 48 spaced apart from one another and extending outward from the periphery of the skirt 20. Each of the lugs 48 contains an opening 50 to receive one of the bolts 36 (not shown in Figure 9).
  • a cross bar 51 provides stability to the skirt 20 and to the housing 4 so that the side walls do not flex outward. If the side walls of the housing and of the skirt were to flex outward the fuel/air mixture could escape from the chamber 16 outside of the border 24 of the cartridge 8 (not shown in Figure 9).
  • Figure 10 is a side view of the skirt shown in Figure 9.
  • the same reference numerals are used in Figure 10 to describe those components that are identical to the components of Figure 9.
  • FIG 11 there is a schematic side view of a heating unit 52.
  • the heating unit 52 has a propane tank 54 (i.e. a fuel supply) from which liquid propane is drawn by a pump 56 through a supply pipe 58 to a vaporizer 60.
  • the propane gas from the output of the vaporizer 60 passes through a control regulator 62 where the pressure of the gas is reduced from approximately 100 psi. to between 30 and 80 psi as indicated by a gauge 64.
  • the propane gas continues through a supply line 66 into the burner 2 through the venturi (not shown in Figure 11).
  • the gas pressure passing through the venturi entrains air at the proper air/gas ratio for complete combustion.
  • Liquid propane at a pressure above approximately 100 psi is returned to the propane tank 54 through a liquid return pipe 70 and bypass valve 72.
  • FIG 12 there is shown a schematic side view of a further embodiment of a heating unit 74.
  • the heating unit 74 does not require the use of a pump.
  • Those components of Figures 11 and 12 that are identical to the components described in Figure 1 are referred to using the same reference numerals as those used in Figure 1.
  • Those components referred to in Figure 12 that are identical to the components of Figure 11 are described using the same reference numerals as those used in Figure 11.
  • the propane tank 54 feeds liquid propane by gravity through supply pipe 58 into the vaporizer 60.
  • a portion of the high pressure vaporized propane gas at the output of the vaporizer 60 passes through a regulator 76 set at 100 psi and returns to the propane tank through a vapor return pipe 70.
  • the regulator 76 will shut off automatically when the pressure of the propane gas has reached 100 psi. Therefore, the liquid propane is forced into pipe 58 by the high pressure gaseous propane at the top of tank 54. If the pressure of the gaseous propane drops below 100 psi, the regulator 76 is opened again to force additional liquid propane into the supply pipe 58, which will eventually return the pressure of the vaporized propane gas to 100 psi.
  • a majority of the gaseous propane from the output of the vaporizer 60 is passed through control regulator 62, which reduces the pressure of the gaseous propane from 100 psi to between 30 and 80 psi as indicated by the gauge 64.
  • the propane gas continues through the supply line 66 into the burner 2 through the venturi (not shown in Figure 12).
  • the cartridge 8 is in one piece.
  • the fact that the cartridge is held in place by only eight bolts (with corresponding nuts) allows the cartridge to be removed and replaced quickly (i.e. in less than fifteen minutes).
  • the stainless steel mesh layer of the cartridge is similar to steel wool and can be referred to as a skein.
  • the skein prevents any flame that gets through the ceramic fiber or wool from passing further through the cartridge into the chamber 16. If the ceramic wool fails, the stainless steel skein quenches the combustion of the air/propane mixture and prevents the ignition of the air/propane mixture within the chamber, thereby protecting the burner from damage.
  • propane is the preferred fuel
  • other liquid hydrocarbon fuels that can be readily vaporized will be suitable.
  • propane is the preferred fuel
  • propane other liquid hydrocarbon fuels that can be readily vaporized will be suitable.
  • butane, pentane, ethane, methane or combinations with other fuels will be suitable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Spray-Type Burners (AREA)
  • Resistance Heating (AREA)
  • Feeding And Controlling Fuel (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

A heating unit has a cartridge that constitutes a single component, which can be readily removed and replaced with a new cartridge. The cartridge is a plurality of non-flammable layers bound together in a border. The layers include a stainless steel mesh located above a layer of ceramic wool. With the cartridge, replacement can be accomplished in less then fifteen minutes compared to a downtime of a week or more previously.

Description

A GAS FIRED RADIANT HEATING UNIT AND METHOD OF OPERATION THEREOF
BACKGROUND OF THE INVENTION FIELD OF INVENTION
This invention relates to an improved radiant heating unit and to an improved method of operation thereof. More particularly, this invention relates to a gas powered radiant heating unit that can be used with roadway surface reconditioning machines to heat various surfaces, including asphalt over a relatively large area. DESCRIPTION OF THE PRIOR ART
It is known to have radiant heating units for use in repairing asphalt roadway surfaces. The units can be used with a scarifier or patcher. Most units are powered by low pressure propane gas. A radiant heating unit is described in U.S. Patent No. 5,218,952 issued to Neufeldt on June 15, 1993. The Neufeldt patent describes a radiant heating unit having a housing with a layer of ceramic fiber sandwiched between two layers of mesh. The heating unit described in the Neufeldt patent works well and is designed to withstand rough treatment. However, due to the extreme temperature conditions under which the heating unit operates, the mesh can fail or the ceramic fiber can become damaged. When this occurs, the housing portion of the unit must be returned to the manufacturer for refurbishing. The manufacturer then removes the old layers and replaces them with a new layer of ceramic fiber sandwiched between two new layers of mesh. This procedure takes approximately five to six hours for the manufacturer to complete, but the downtime for the unit to the user can easily be one to two weeks.
SUMMARY OF THE INVENTION It is an object of the present invention to improve the heating unit described in U.S.
Patent No. 5, 218,952 by allowing the unit to be repaired quickly on site, thereby virtually eliminating nearly all of the downtime required for the previous device. It is a further object of the present invention to provide a cartridge that is quickly and easily removable and replaceable within the unit on site, the cartridge including the layer of ceramic fibre. A radiant heating unit has supply means for supplying a quantity of fuel in vapor form at a predetermined pressure. There are means to mix air into the fuel and a housing having a periphery surrounding an open bottom. A removable and replaceable cartridge is affixed to the periphery, the cartridge covering the open bottom with a skirt extending downward beyond the cartridge. The housing and the cartridge define a chamber and the cartridge separates the chamber from' ambient air. The chamber is connected to receive a fuel/air mixture. The cartridge is removable and replaceable in the housing and contains multiple layers of non-flammable materials that are bound together into a single component. The layers are porous enough to allow the fuel/air mixture to flow through the cartridge at a rate so that combustion occurs at an outer surface of the cartridge.
A method of operating a radiant heating unit having a housing with an open bottom and a cartridge covering the open bottom with a skirt extending downward from the cartridge, the cartridge being sandwiched between the housing and skirt by retainers, the cartridge and housing defining a chamber, said method comprising the steps of commencing with a cartridge installed in the unit, when the cartridge becomes worn, removing the cartridge from the housing on site by removing the retainers, separating the skirt from the cartridge, and replacing the cartridge with a replacement cartridge and attaching the skirt to the housing with the cartridge sandwiched in between by reattaching the retainers.
BRIEF DESCRIPTION OF THE DRAWINGS In Figure 1, there is shown a schematic side view of a burner housing; Figure 2 is a top view of a cartridge;
Figure 3 is a partial sectional side view of the cartridge of Figure 2; Figure 4 is a side view of the housing with control means on top;
Figure 5 is an end view of the housing with said control means on top; Figure 6 is a top view of an upper section of the heater with the control means removed;
Figure 7 is a side view of the upper section of the heater; Figure 8 is an end view of said upper section;
Figure 9 is a top view of a lower skirt of the heater; Figure 10 is a side view of the lower skirt;
Figure 11 is a schematic side view of one embodiment of the heating unit including the fuel supply; and Figure 12 is a schematic side view of another embodiment of the heating unit including the fuel supply. DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT In Figure 1 , there is shown a burner 2 having a housing 4 with a bottom 6 covered by a cartridge 8. The housing can be referred to, more specifically, as a plenum. The burner 2 has a fuel supply line 10, which supplies a fuel mixture through an orifice 12 in a venturi 14. The housing 4 and cartridge 8 define a chamber 16. Within the chamber 16, there is located a deflector 18, which distributes the fuel/air mixture evenly into the cartridge 8. A skirt 20 extends downward from the cartridge 8. The skirt protects the cartridge from physical damage and maintains a minimum distance between the cartridge and a surface (not shown) to be heated. The cartridge 8 is sandwiched between the housing and the skirt.
In Figure 2, it can be seen that the cartridge has a top layer 22 and a rigid border 24. In Figure 3, it can be seen that the cartridge has four layers, a top layer 22 being an expandable metal screen, a second layer 26, located immediately beneath the top layer 22, made of stainless steel mesh (skein), a third layer 28, being an aluminum screen, located immediately beneath the second layer 26 and a bottom layer 30. The bottom layer 30 is made from ceramic wool. The layers are held together by the border 24, which is preferably crimped around the periphery of the layers 22, 26, 28, 30. Seals 32 are crimped between the border 24 and the top layer 22 and between the border 24 and the bottom layer 30 to prevent the fuel/air mixture (not shown) from leaking around the periphery of the layers. The cartridge is a single component.
In Figure 4, there is shown a side view of the burner 2 with a venturi cover 34 mounted on top of the housing 4. It can be seen that the cartridge 8 "is sandwiched between the housing 4 and the skirt 20 by bolts 36 and nuts 38. There are three bolts shown in Figure 4, but there are preferably only eight bolts in total, three along each side of the housing 4 and one bolt at each end. It can be seen that Figure 5 is an end view of the housing shown in Figure 4. The same reference numerals are used in Figure 5 as those used in Figure 4 to describe those components that are identical to one another. The cartridge can be affixed between the housing and the skirt by retainers other than bolts. If bolts are used, the number of bolts could be more or less than eight. In Figure 6, there is shown a top view of the housing 4 with the control means 34 removed. It can be seen that there are eight clips 40 spaced around a periphery of the housing 4. Each of the clips 40 contains an opening 42 to receive one of the bolts 36 (not shown in Figure 6). A fuel/air mixture inlet 44 is located approximately in the center of the housing 4. In Figure 7, there is shown a side view of the housing shown in Figure 6. Those components that are identical to the components shown in Figure 6 are described using the same reference numerals. A flange 45 located at the top corners of the housing 4 serves as a mounting bracket. Figure 8 is an end view of the housing shown in Figure 7 and the same reference numerals are used in Figure 8 as those used in Figure 7 to refer to those components that are identical.
In Figure 9, there is shown a top view of the skirt 20. It can be seen that an upper surface of the skirt 20 has a screen 46 affixed thereto. The screen 46 provides support to the cartridge 8 when the skirt is installed on the burner 2 with the cartridge sandwiched between the skirt 20 and the housing 4. More particularly, the screen 46 provides support to the ceramic wool layer or bottom layer 30 of the cartridge 8. It can also be seen that the skirt 20 has a periphery with eight lugs 48 spaced apart from one another and extending outward from the periphery of the skirt 20. Each of the lugs 48 contains an opening 50 to receive one of the bolts 36 (not shown in Figure 9). A cross bar 51 provides stability to the skirt 20 and to the housing 4 so that the side walls do not flex outward. If the side walls of the housing and of the skirt were to flex outward the fuel/air mixture could escape from the chamber 16 outside of the border 24 of the cartridge 8 (not shown in Figure 9).
Figure 10 is a side view of the skirt shown in Figure 9. The same reference numerals are used in Figure 10 to describe those components that are identical to the components of Figure 9.
In Figure 11 , there is a schematic side view of a heating unit 52. The heating unit 52 has a propane tank 54 (i.e. a fuel supply) from which liquid propane is drawn by a pump 56 through a supply pipe 58 to a vaporizer 60. The propane gas from the output of the vaporizer 60 passes through a control regulator 62 where the pressure of the gas is reduced from approximately 100 psi. to between 30 and 80 psi as indicated by a gauge 64. The propane gas continues through a supply line 66 into the burner 2 through the venturi (not shown in Figure 11). The gas pressure passing through the venturi entrains air at the proper air/gas ratio for complete combustion. Liquid propane at a pressure above approximately 100 psi is returned to the propane tank 54 through a liquid return pipe 70 and bypass valve 72.
In Figure 12, there is shown a schematic side view of a further embodiment of a heating unit 74. The heating unit 74 does not require the use of a pump. Those components of Figures 11 and 12 that are identical to the components described in Figure 1 are referred to using the same reference numerals as those used in Figure 1. Those components referred to in Figure 12 that are identical to the components of Figure 11 are described using the same reference numerals as those used in Figure 11. In Figure 12, the propane tank 54 feeds liquid propane by gravity through supply pipe 58 into the vaporizer 60. A portion of the high pressure vaporized propane gas at the output of the vaporizer 60 passes through a regulator 76 set at 100 psi and returns to the propane tank through a vapor return pipe 70. The regulator 76 will shut off automatically when the pressure of the propane gas has reached 100 psi. Therefore, the liquid propane is forced into pipe 58 by the high pressure gaseous propane at the top of tank 54. If the pressure of the gaseous propane drops below 100 psi, the regulator 76 is opened again to force additional liquid propane into the supply pipe 58, which will eventually return the pressure of the vaporized propane gas to 100 psi.
A majority of the gaseous propane from the output of the vaporizer 60 is passed through control regulator 62, which reduces the pressure of the gaseous propane from 100 psi to between 30 and 80 psi as indicated by the gauge 64. The propane gas continues through the supply line 66 into the burner 2 through the venturi (not shown in Figure 12).
Preferably, the cartridge 8 is in one piece. The fact that the cartridge is held in place by only eight bolts (with corresponding nuts) allows the cartridge to be removed and replaced quickly (i.e. in less than fifteen minutes).
The stainless steel mesh layer of the cartridge is similar to steel wool and can be referred to as a skein. The skein prevents any flame that gets through the ceramic fiber or wool from passing further through the cartridge into the chamber 16. If the ceramic wool fails, the stainless steel skein quenches the combustion of the air/propane mixture and prevents the ignition of the air/propane mixture within the chamber, thereby protecting the burner from damage. While propane is the preferred fuel, other liquid hydrocarbon fuels that can be readily vaporized will be suitable. For example, butane, pentane, ethane, methane or combinations with other fuels will be suitable.

Claims

I CLAIM:
1. A radiant heating unit comprising:
(a) a supply for providing a quantity of fuel in vapor form at a predetermined pressure;
(b) means to mix air into said fuel to produce a combustible fuel/air mixture;
(c) a housing having a periphery surrounding an open bottom;
(d) a removable and replaceable cartridge being affixed to said periphery, said cartridge covering said open bottom, with a skirt extending downward beyond said cartridge, said housing and said cartridge defining a chamber, said cartridge separating said chamber from ambient air;
(e) said chamber being connected to receive said fuel/air mixture;
(f) said cartridge being removable from and replaceable in said housing, said cartridge containing multiple layers of non-flammable materials that are bound together into one unit, said layers being porous enough to allow said fuel/air mixture to pass through said layers but sufficiently dense to prevent large amounts of ambient air from entering said chamber through said cartridge so that combustion occurs at an outer surface of an outermost layer.
2. A radiant heating unit as claimed in Claim 2 wherein one layer of the cartridge is ceramic wool.
3. A radiant heating unit as claimed in Claim 2 wherein there is a stainless steel mesh located above the layer of ceramic wool.
4. A radiant heating unit as claimed in Claim 3 wherein the cartridge has an expandable metal screen located above the stainless steel mesh and an aluminum screen located between the stainless steel mesh and the ceramic wool.
5. A radiant heating unit as claimed in Claim 4 wherein the layers of the cartridge are bound together by a border which surrounds a periphery of the layers, said layers being crimped between an upper and lower section of said border.
6. A radiant heating unit as claimed in Claim 5 wherein there is a seal between said border and said layers.
7. A radiant heating means as claimed in Claim 1 wherein said skirt is rugged enough to protect said cartridge when said cartridge is properly installed within the housing.
8. A radiant heating unit as claimed in Claim 1 wherein said cartridge is held in place within said housing by a maximum of eight retainers.
9. A radiant heating unit as claimed in Claim 6 wherein there is a return line to said supply to return liquid fuel to said supply.
10. A radiant heating unit as claimed in Claim 1 wherein said cartridge is sandwiched between said skirt and said housing.
11. A radiant heating unit as claimed in Claim 2 wherein there is no pump in said unit.
12. A heating unit as claimed in Claim 1 wherein the means to mix is a venturi.
13. A heating unit as claimed in Claim 1 wherein the fuel is propane.
14. A heating unit as claimed in Claim 1 wherein the chamber contains a deflector to distribute the fuel/air mixture.
15. A method of operating a radiant heating unit having a housing with an open bottom and a cartridge covering said bottom with a skirt extending downward from said cartridge, said cartridge being sandwiched between said housing and said skirt by retainers, said cartridge and housing defining a chamber, said method comprising the steps of commencing with a cartridge installed in said unit, when said cartridge becomes worn, removing said cartridge frcm said housing on site by removing said retainers, separating said skirt from said cartridge, replacing said cartridge with a replacement cartridge and attaching said skirt to said housing with said cartridge sandwiched in between by reattaching said retainers.
16. A method of operating a radiant heating unit as claimed in Claim 15 wherein said cartridge is held in place between said housing and said skirt by a maximum of eight retainers, said method comprising the steps of opening said retainers, removing said skirt and said cartridge, replacing said cartridge with a replacement cartridge and closing said retainers after installing said replacement cartridge and said skirt.
EP03722151A 2002-05-15 2003-05-15 A gas fired radiant heating unit Expired - Lifetime EP1504220B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US38026502P 2002-05-15 2002-05-15
US380265P 2002-05-15
US260552 2002-10-01
US10/260,552 US6669467B2 (en) 2002-05-15 2002-10-01 Gas fired radiant heating unit and method of operation thereof
PCT/CA2003/000709 WO2003098108A1 (en) 2002-05-15 2003-05-15 A gas fired radiant heating unit and method of operation thereof

Publications (2)

Publication Number Publication Date
EP1504220A1 true EP1504220A1 (en) 2005-02-09
EP1504220B1 EP1504220B1 (en) 2011-10-19

Family

ID=29423226

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03722151A Expired - Lifetime EP1504220B1 (en) 2002-05-15 2003-05-15 A gas fired radiant heating unit

Country Status (9)

Country Link
US (2) US6669467B2 (en)
EP (1) EP1504220B1 (en)
CN (1) CN100357661C (en)
AT (1) ATE529702T1 (en)
AU (1) AU2003229451A1 (en)
CA (1) CA2485647C (en)
HK (1) HK1074244A1 (en)
MX (1) MXPA04011334A (en)
WO (1) WO2003098108A1 (en)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6986659B2 (en) * 2001-12-06 2006-01-17 Hwai-Tay Lin Gas burner with laminate catalytic device
GB2392190B (en) * 2002-08-16 2005-12-21 Roads Europ Ltd Improved road repair systems
US7037036B2 (en) * 2003-03-14 2006-05-02 Strassman David R Asphalt seam heater
US8296968B2 (en) 2003-06-13 2012-10-30 Charles Hensley Surface drying apparatus and method
US20090172968A1 (en) * 2003-06-13 2009-07-09 Charles Hensley Thawing apparatus and method
GB2418444B (en) * 2004-07-21 2009-11-25 Roads Europ Ltd Improved road repair systems
US20070077530A1 (en) * 2005-09-22 2007-04-05 Jens-Uwe Meyer Emitter apparatus
US20080241776A1 (en) * 2007-03-28 2008-10-02 Constantin Burtea Infrared emitting gas burner
US7717704B2 (en) * 2007-03-28 2010-05-18 Prince Castle, Inc. Wire mesh burner plate for a gas oven burner
US8562247B2 (en) 2009-01-02 2013-10-22 Heatwurx, Inc. Asphalt repair system and method
US8556536B2 (en) 2009-01-02 2013-10-15 Heatwurx, Inc. Asphalt repair system and method
GB2470889A (en) * 2009-03-02 2010-12-15 Asphalt Re Lay Ltd Apparatus for supplying a source of infra-red heat to a surface or substance
US9416499B2 (en) 2009-12-31 2016-08-16 Heatwurx, Inc. System and method for sensing and managing pothole location and pothole characteristics
US8801325B1 (en) 2013-02-26 2014-08-12 Heatwurx, Inc. System and method for controlling an asphalt repair apparatus
US10690340B2 (en) * 2010-01-06 2020-06-23 Precision Combustion, Inc. Flameless cooking appliance
CN102032573B (en) * 2010-12-13 2013-03-27 刘新 Full premix gas cambered-cylinder infrared burner
US8637792B2 (en) 2011-05-18 2014-01-28 Prince Castle, LLC Conveyor oven with adjustable air vents
US8992118B2 (en) 2013-03-15 2015-03-31 William B. Coe Pavement repair system utilizing solid phase autoregenerative cohesion
CA2906019C (en) 2013-03-15 2021-07-13 William B. Coe Pavement repair system
USD700633S1 (en) 2013-07-26 2014-03-04 Heatwurx, Inc. Asphalt repair device
CN106537036A (en) * 2014-03-18 2017-03-22 詹政通 Stove core structure of infrared gas stove
GB2547672B (en) 2016-02-25 2018-02-21 Rejuvetech Ltd System and method
MX2019009484A (en) 2017-02-14 2019-11-05 B Coe William Apparatus and method for preparing asphalt and aggregate mixture.
WO2018165768A1 (en) * 2017-03-17 2018-09-20 Smart Fix Asphalt Infrared Repair Ltd. Apparatus and method for infrared heating of asphalt
US11598528B2 (en) * 2019-10-17 2023-03-07 Pinnacle Climate Technologies Multi-dimensional ceramic burner surface

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3044805A (en) * 1959-06-22 1962-07-17 Frank A Mcdonald Bellows-type expansion compensator with spring-controlled tubular braided shroud
US3040805A (en) * 1960-04-07 1962-06-26 Agard L Lambert Infra-red gas-fueled heater
GB931201A (en) * 1961-01-17 1963-07-10 Radiation Ltd Improvements in and relating to radiating or incandescent burners
US3122197A (en) * 1961-06-28 1964-02-25 Caloric Appliance Corp Radiant burner
US3326265A (en) * 1965-03-16 1967-06-20 Ray J Paulin Radiant heating means
US3722866A (en) 1970-04-03 1973-03-27 Produits Refractaires Apparatus for feeding a gas furnace
US3785763A (en) * 1972-03-31 1974-01-15 R Bratko Infra-red burner
US3857670A (en) * 1973-03-29 1974-12-31 Int Magna Corp Radiant burner
US3852025A (en) 1973-09-28 1974-12-03 Int Magna Corp Infra-red heater
US4039275A (en) * 1976-02-23 1977-08-02 Mcgettrick Charles A Infrared energy generator with orifice plate
DE2706043C2 (en) * 1977-02-12 1982-09-16 Herbert 4050 Mönchengladbach Baumanns Radiant burner
US4189297A (en) * 1977-10-26 1980-02-19 Slyman Manufacturing Corporation Matrix mounting means for gas burners
US4601605A (en) * 1984-07-20 1986-07-22 Johnson Re-Cycling International Inc. Roadway surface reconditioning apparatus
US4559922A (en) * 1984-10-01 1985-12-24 Crupi Franco A Machine for softening an asphalt road surface
US5114284A (en) * 1988-02-16 1992-05-19 Keizer Gregory J Heater for asphalt pavement or the like
US4927355A (en) * 1988-11-01 1990-05-22 Enerco Technical Products, Inc. Burner assembly
JPH0630883Y2 (en) * 1989-04-17 1994-08-22 大成ロテック株式会社 Road surface heating device for road surface reclaiming method
US5218952A (en) * 1990-10-29 1993-06-15 Neufeldt Allen A Radiant heating apparatus
US5397199A (en) * 1993-08-06 1995-03-14 Caterpillar Paving Products Inc. Screed assembly for an asphalt paving machine
CA2131429C (en) * 1994-09-02 2003-11-11 Patrick C. Wiley Process for heating an asphalt surface and apparatus therefor
AU3572495A (en) * 1994-09-30 1996-04-26 Jones, Philomena Joan Heaters
US6190162B1 (en) * 1999-02-11 2001-02-20 Marsden, Inc. Infrared heater and components thereof
CN2389289Y (en) * 1999-09-21 2000-07-26 李建民 Gas infrared ray burner
US6371689B1 (en) * 1999-10-29 2002-04-16 Dynaire Industries, Ltd. Method of and apparatus for heating a road surface for repaving

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03098108A1 *

Also Published As

Publication number Publication date
CN1662775A (en) 2005-08-31
US6669467B2 (en) 2003-12-30
CA2485647C (en) 2011-07-12
CA2485647A1 (en) 2003-11-27
US20040076917A1 (en) 2004-04-22
HK1074244A1 (en) 2005-11-04
WO2003098108A1 (en) 2003-11-27
CN100357661C (en) 2007-12-26
US6872072B2 (en) 2005-03-29
MXPA04011334A (en) 2005-06-03
AU2003229451A1 (en) 2003-12-02
US20030213485A1 (en) 2003-11-20
ATE529702T1 (en) 2011-11-15
EP1504220B1 (en) 2011-10-19

Similar Documents

Publication Publication Date Title
US6872072B2 (en) Gas fired radiant heating unit and method of operation thereof
US5218952A (en) Radiant heating apparatus
EP1144916B1 (en) Burner and process for operating gas turbines
US2121271A (en) Hydrocarbon burner
US5295817A (en) Apparatus and method for combusting crude oil
GB2032080A (en) Starting a fluidised bed combustion chamber
US5759024A (en) Fuel vaporizer
CA2028781C (en) Radiant heating apparatus
EP0646707B1 (en) Self purging fuel injector for a gas turbine engine combustor
KR200141461Y1 (en) Heater structure of oil combustor
US20080072891A1 (en) Heat panel system
US1304754A (en) Gas-distribution apparatus
US2322496A (en) Fuel burner
KR100905229B1 (en) Gas burner system for painting chamber
KR20240122209A (en) The System for controlling the gas of the generator
GB2034873A (en) Method of burning liquid fuel
US1687273A (en) warrick
US1090395A (en) Oil-burning apparatus.
KR200158425Y1 (en) Kerosene combustor
KR200153990Y1 (en) Oil combustor
US1324755A (en) Hydrocarbon-burner
CN2210342Y (en) liquid fuel combustion furnace
US329985A (en) Apparatus for burning hydrocarbons
CA2955502A1 (en) Gas heater conversion system and method
US504297A (en) Hydrocarbon-burner

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20041117

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK

DAX Request for extension of the european patent (deleted)
REG Reference to a national code

Ref country code: HK

Ref legal event code: DE

Ref document number: 1074244

Country of ref document: HK

17Q First examination report despatched

Effective date: 20081104

RTI1 Title (correction)

Free format text: A GAS FIRED RADIANT HEATING UNIT

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 60338818

Country of ref document: DE

Effective date: 20111222

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20111019

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111019

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120220

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111019

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111019

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120120

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111019

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111019

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111019

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120119

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111019

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111019

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111019

REG Reference to a national code

Ref country code: HK

Ref legal event code: GR

Ref document number: 1074244

Country of ref document: HK

26N No opposition filed

Effective date: 20120720

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 60338818

Country of ref document: DE

Effective date: 20120720

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120531

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120531

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120531

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20120130

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120515

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111019

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20111019

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120515

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20030515

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20150526

Year of fee payment: 13

Ref country code: DE

Payment date: 20150529

Year of fee payment: 13

Ref country code: SE

Payment date: 20150528

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20150528

Year of fee payment: 13

Ref country code: IT

Payment date: 20150528

Year of fee payment: 13

Ref country code: FR

Payment date: 20150528

Year of fee payment: 13

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60338818

Country of ref document: DE

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 529702

Country of ref document: AT

Kind code of ref document: T

Effective date: 20160515

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20160515

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160516

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160515

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160515

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20170131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20161201

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20160515